A fashion designer was handed a time-served sentence in Manhattan yesterday for admittedly forcing oral sex on an aspiring female model — but he’ll stay in a California prison for at least another 54 years under his previous conviction there for additional casting-couch sex attacks on 16 model wannabes.

Anand Jon Alexander, 39, had originally been charged in Manhattan with sex attacks on 12 women and girls, including first degree rape. Prosecutors dropped all but one of those cases when Alexander struck his no-additional-jail plea deal here in February.

“Anand Jon is a predator. He is a threat to the community,” assistant district attorney Maxine Rosenthal said at the sentencing. The fiendish fashionista designed under the name “Anand Jon,” and his India-inspired clothing had been worn by Paris Hilton, Oprah Winfrey, Janet Jackson, Rosario Dawson and Laurence Fishburne.

Alexander lured his victims with promises of fame, but, “As soon as he brought them to his home, sexually assaulted them,” the prosecutor said in successfully asking that he be ranked a level three sex offender, the highest level.

All 12 of the women in Alexander’s original 49-count Manhattan indictment are OK with his no-additional-jail plea deal, the prosecutor said. “They were satisfied due to the length of the sentence in California,” she said.

Given a chance to speak at his sentencing, Alexander, in turn, implied he only admitted to the one Manhattan attack, “based on certain assurances” made to him by his lawyers, who have said the designer is in a hurry to return to California to work on his appeal there using newly-available evidence from the Manhattan investigation.

“I’d like to thank everybody for being here,” he told a courtroom full of supporters, some wearing “Free Anand Jon” t-shirts.

Defense lawyers say Alexander hopes to overturn his California conviction by arguing he had ineffective counsel there; he will return to the West Coast with evidence that the women in that case were squaring their stories among themselves and with civil attorneys, something his old lawyers never brought up at trial.